Abstract
The electrochemical properties of high-valence silver oxide Ag3O4 in alkaline solution were investigated for the first time and the reduction mechanism of Ag3O4 was proposed. It can be recognized that Ag3O4 consists of Ag(Ⅲ) and Ag(Ⅱ)~(*). From the results of voltammetry and XRD experiments it was found that the reduction process of Ag3O4 was more complicated. It could be electrochemically reduced through the series reactions of Ag(Ⅲ) →Ag(Ⅱ) →Ag(Ⅰ) →Ag(O) at low discharge rate or Ag(Ⅲ) →Ag(Ⅰ) →Ag(O) at higher discharge rate.And the Ag(Ⅱ)~(*) could be reduced to Ag directly at low potential region.In addition,it is interesting to note that Ag3O4 presents the theoretical specific discharge capacity of 553.0mAh/g at high discharge rate, which is 27.8% higher than that of the commonly used cathodic material AgO in zinc/silver oxide battery.Under high discharge rate of 119C, Ag3O4 still presents the specific discharge capacity as high as 83% of theoretical value. Ag3O4 may have the attractive future for the use in alkaline batteries.
Keywords
High valence silver oxide, Ag_(3)O_(4), Silver-zinc battery, Alkaline battery
Publication Date
2006-05-28
Online Available Date
2006-05-28
Revised Date
2005-12-05
Received Date
2005-11-11
Recommended Citation
Yan CHENG, Ming YU, Man-ming YAN, Zhi-yu JIANG.
Electrochemical Behavior and Reduction Mechanism of High Valence Silver Oxide Ag3O4 in Alkaline Solution[J]. Journal of Electrochemistry,
2006
,
12(2): 134-139.
DOI: 10.61558/2993-074X.3328
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol12/iss2/24
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